function(add_shader)
    cmake_parse_arguments(args
        "" "NAME" "SOURCES" ${ARGN}
    )
    if("${args_NAME}" STREQUAL "")
        message( FATAL_ERROR "add_shader misses NAME" )
    endif()

    set(output ${CMAKE_SOURCE_DIR}/shaders/${args_NAME}.spv)

    add_custom_command(
        OUTPUT ${output}
        COMMAND glslangValidator -V -o ${output} ${args_SOURCES}
        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
        DEPENDS ${args_SOURCES}
    )
    add_custom_target(${args_NAME} ALL DEPENDS ${output})
endfunction()